Farmers can use the tools to predict the chalky grain percentage and protein content in the field. This will allow them to assess how much nitrogen fertilizer they need in real-time. "Our goal is to facilitate the stable production of rice in a changing climate," Nakano says. "It is important to establish an ideal nitrogen application rate using growth diagnosis. In this study, we identified useful factors to regulate white-back grains (one type of chalky grain) and protein content."